From 7eb07ccdca178abffe5ffccf686b4f818db3601d Mon Sep 17 00:00:00 2001 From: ame Date: Fri, 17 Nov 2023 10:10:47 -0600 Subject: tons of hashes bleh --- b.c | 83 --------------------------------------------------------------------- 1 file changed, 83 deletions(-) delete mode 100644 b.c (limited to 'b.c') diff --git a/b.c b/b.c deleted file mode 100644 index 1f08f1f..0000000 --- a/b.c +++ /dev/null @@ -1,83 +0,0 @@ -#include -#include -#include - -int char_index(int c){ - if(c <= 25) return 65 + c; - if(c <= 51) return 71 + c; - if(c <= 61) return (c - 52)+48; - if(c == 62) return 43; - if(c == 63) return 47; - return 61; -} - -int ichar_index(int c){ - if(65 <= c && c <= 90) return c - 65; - if(97 <= c && c <= 122) return c - 97 + 26; - if(48 <= c && c <= 57) return c - 48 + 52; - if(c == 47) return 63; - return 0; -} - -int de_base64(char* in, char* out){ - int len = 0; - for(int i = 0; in[i]!='\0'; i++) len++; - - //char out[len]; - for(int i = 0; i < len; i+=4){ - uint8_t u1 = i>len?0:in[i]; - uint8_t u2 = i+1>len?0:in[i+1]; - uint8_t u3 = i+2>len?0:in[i+2]; - uint8_t u4 = i+3>len?0:in[i+3]; - - u1 = ichar_index(u1); - u2 = ichar_index(u2); - u3 = ichar_index(u3); - u4 = ichar_index(u4); - - uint8_t left = u1 << 2 | u2 >> 4; - uint8_t middle = u2 << 4 | u3 >> 2; - uint8_t right = u3 << 6 | u4; - - if(u4==0) sprintf(out,"%s%c%c",out,left,middle); - else if(u3==0) sprintf(out,"%s%c",out,left); - else sprintf(out,"%s%c%c%c",out,left,middle,right); - - } - return 0; -} -int en_base64(char* in, char* out){ - int len = 0; - for(int i = 0; in[i]!='\0'; i++) len++; - - //char out[(len+1)*3]; - for(int i = 0; i < len; i+=3){ - uint8_t f = i>len?0:in[i]; - uint8_t s = i+1>len?0:in[i+1]; - uint8_t t = i+2>len?0:in[i+2]; - - uint8_t i1 = f>>2; - uint8_t i2 = (uint8_t)(f<<6)>>2 | (s>>4); - uint8_t i3 = (uint8_t)(s<<4)>>2 | (t>>6); - uint8_t i4 = t & 0x3f; - - if(t==0)i4 = 64; - if(s==0)i3 = 64; - sprintf(out,"%s%c%c%c%c",out,char_index(i1),char_index(i2), - char_index(i3),char_index(i4)); - } - return 0; -} - -int main(){ - char* uwu = "Many hands make light work.AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"; - char uwue[20*8000]; - char uwud[20*8000]; - - en_base64(uwu, uwue); - de_base64(uwue, uwud); - - printf("%s\n%s\n%s",uwu,uwue,uwud); -} - - -- cgit v1.2.3